@media screen and (max-width 768px) in css code example
Example: css media queries
@media only screen and (max-width: 1200px){
/*Tablets [601px -> 1200px]*/
}
@media only screen and (max-width: 600px){
/*Big smartphones [426px -> 600px]*/
}
@media only screen and (max-width: 425px){
/*Small smartphones [325px -> 425px]*/
}